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asp.net+jQueryRotate开发幸运大转盘

2024-07-30 04:06:47   222人阅读

在线抽奖程序在很多网站上很多，抽奖形式多种多样，Flash抽奖偏多，本文将给大家介绍jQuery转盘抽奖，结合代码实例将使用jQuery和asp.net来实现转盘抽奖程序，为了便于理解,文章贴出实现源代码作为分享。通过转动转盘指针来完成抽奖的一种抽奖形式，根据旋转角度来控制指针停留的位置——幸运大转盘。

1、先来张幸运大抽奖效果图


2、Default.aspx页面代码

<span style="font-family:Microsoft YaHei;font-size:14px;"><%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport">
<meta content="yes" name="apple-mobile-web-app-capable">
    <title>幸运大转盘</title>

    <style type="text/css">
     .demo{ position:relative;}
    #disk{ position:relative; z-index:1;}
    #start{ position:absolute; top:-0; z-index:9;}
    #start img{cursor:pointer; border:none;}
    </style>
    <script src=http://www.mamicode.com/"Scripts/jquery-1.7.1.min.js"  type="text/javascript"></script>>
我们构建自定义函数lottery()，在lottery()我们向data.php发送一个POST请求，如果成功返回中奖信息后，调用rotate插件开始转动，转动角度由后台返回的角度决定，这里我们用2880+a表示转动的角度，即指针转动8圈+a度后停止，然后我们在单击“开始抽奖”按钮时调用lottery()，于是转盘抽奖就完成。
3、data.aspx中奖逻辑代码
<span style="font-family:Microsoft YaHei;font-size:14px;">using System;
using System.Collections;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class data : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Hashtable ht = new Hashtable();
        Hashtable p1 = new Hashtable();
        p1.Add("id", 1);
        p1.Add("min", 1);
        p1.Add("max", 59);
        p1.Add("prize", "500积分");
        p1.Add("v", 1);
        ht.Add(0, p1);

        Hashtable p2 = new Hashtable();
        p2.Add("id", 2);
        p2.Add("min", 60);
        p2.Add("max", 119);
        p2.Add("prize", "100积分");
        p2.Add("v", 5);
        ht.Add(1, p2);

        Hashtable p3 = new Hashtable();
        p3.Add("id", 3);
        p3.Add("min", 121);
        p3.Add("max", 179);
        p3.Add("prize", "10元商品");
        p3.Add("v", 5);
        ht.Add(2, p3);

        Hashtable p4 = new Hashtable();
        p4.Add("id", 4);
        p4.Add("min", 180);
        p4.Add("max", 240);
        p4.Add("prize", "500积分");
        p4.Add("v", 10);
        ht.Add(3, p4);

        Hashtable p5 = new Hashtable();
        p5.Add("id", 5);
        p5.Add("min", 240);
        p5.Add("max", 300);
        p5.Add("prize", "谢谢参与");
        p5.Add("v", 80);
        ht.Add(4, p5);

        Hashtable p6 = new Hashtable();
        p6.Add("id", 6);
        p6.Add("min", 300);
        p6.Add("max", 360);
        p6.Add("prize", "订单免单");
        p6.Add("v", 1);
        ht.Add(5, p6);

        //Hashtable p7 = new Hashtable();
        //p7.Add("id", 7);
        //p7.Add("min", new int[6] { 32, 92, 152, 212, 272, 332 });
        //p7.Add("max", new int[6] { 58, 118, 178, 238, 298, 358 });
        //p7.Add("prize", "谢谢参与");
        //p7.Add("v", 50);
        //ht.Add(6, p7);

        //Console.WriteLine(ht[0]);
        int htlength = ht.Count;
        int[] proArr = new int[htlength]; 
        foreach(DictionaryEntry single in ht)
        {
            Hashtable subObj = single.Value as Hashtable;
            proArr[(int)single.Key] = (int)subObj["v"];
        }

        int rid = this.getRand(proArr);
        int jiaodu = 0;
        string prize = null;
        Hashtable res = ht[rid] as Hashtable;
        Random ran = new Random();
        
        if ((int)res["id"] == 7)
        {
            int[] mins = (int[])res["min"];
            int[] maxs = (int[])res["max"];
            int i = ran.Next(0, 5);
            jiaodu = ran.Next(mins[i], maxs[i]);
        }
        else
        {
            int mins = (int)res["min"];
            int maxs = (int)res["max"];
            jiaodu = ran.Next(mins, maxs);
        }
        
        prize = res["prize"].ToString();



        string json = "{\"angle\":" + jiaodu.ToString() + ",\"prize\":\"" + prize + "\"}";
        Response.Write(json);
        //Dictionary<string, Dictionary<string,string>> dt = new Dictionary<string, Dictionary<string,string>>();
    }

    public int getRand(int[] proArr) 
    {
        int result = -1;
        int proSum = 0;
        foreach(int val in proArr)
        {
            proSum += val;
        }
        int length = proArr.Length;
        for (int i = 0; i < length; i++)
        { 
            Random ran = new Random();
            int ranNum = ran.Next(1, proSum);
            if (ranNum <= proArr[i])
            {
                result = i;
                break;
            }
            else 
            {
                proSum -= proArr[i];
            }
        }
        return result;
    }


}</span>
V参数代表百分比，默认为100，V月大代表该奖项中奖率越高，越小中奖率越小。

asp.net+jQueryRotate开发幸运大转盘


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